<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
* {margin:0; padding:0;}
#div1 {width:712px; height:108px; margin:100px auto; position:relative; background:red;}
#div1 ul {position:absolute; left:0; top:0;}
#div1 ul li {float:left; width:178px; height:108px; list-style:none;}
</style>
<script>
window.onload=function ()
{
	var oDiv=document.getElementById('div1');
	var oUl=oDiv.getElementsByTagName('ul')[0];
	var aLi=oUl.getElementsByTagName('li');
	
	oUl.innerHTML=oUl.innerHTML+oUl.innerHTML;
	oUl.style.width=aLi[0].offsetWidth*aLi.length+'px';
	
	setInterval(function (){
		oUl.style.left=oUl.offsetLeft-2+'px';
	}, 30);
};
</script>
</head>

<body>
<div id="div1">
    <ul>
    	<li><img src="img2/1.jpg" /></li>
    	<li><img src="img2/2.jpg" /></li>
    	<li><img src="img2/3.jpg" /></li>
    	<li><img src="img2/4.jpg" /></li>
    </ul>
</div>
</body>
</html>
